西藏不同地区畜产品中矿质元素的含量测定及比较分析

Determination and comparative analysis of mineral elements in animal products in different areas of Tibet

中文关键词:  畜产品  电感耦合等离子体质谱法  矿质元素  含量测定  比较分析

英文关键词:animal products  inductively coupled plasma-mass spectrometry  mineral elements  content determination  comparative analysis

中文摘要:

      目的 分析西藏不同地区畜产品中矿质元素的富集规律。方法 本研究以西藏4个地市(拉萨、林芝、日喀则、山南)162份畜产品为研究对象。采用微波消解-电感耦合等离子体质谱法(inductively-coupled plasma-mass spectrometry, ICP-MS)测定西藏4地市畜产品中的Na、Mg、K、Ca、Mn、Fe、Sr、Cu、Zn、Se、Cd、Pb、Cr、As、Hg 15种矿质元素含量。分析不同地区畜产品中矿质元素含量的差异性。结果 各元素均呈良好的线性关系, 相关系数在0.9968~0.9999, 畜产品中15种矿质元素检测方法的检出限为0.0047~ 0.5871 ng/mL。畜产品中矿质元素的含量为K、Na、Mg较高, Ca、Zn、Fe、Cu次之, 具有潜在生理毒性的重金属Cd、Pb、Cr、As、Hg含量较低。林芝和山南的畜产品中均未检出Cd; 日喀则的畜产品中均未检出总As; 拉萨和日喀则畜产品中Cd、总Hg均超标。矿物质中含量最高的常量元素是K, 含量最高的微量元素是Fe。结论 西藏不同地区畜产品中矿质元素含量存在一定差异性。

英文摘要:

      Objective To analyze the enrichment of mineral elements in animal products in different areas of Tibet. Methods In this study, 162 animal products from 4 cities in Tibet (Lhasa, Linzhi, Rikaze and Shannan) were selected as the research objects. The content of 15 kinds of mineral elements (Na, Mg, K, Ca, Mn, Fe, Sr, Cu, Zn, Se, Cd, Pb, Cr, As, and Hg) in animal products from 4 cities in Tibet were determined by microwave digestion inductively coupled plasma-mass spectrometry (ICP-MS). The content of heavy metal elements were determined and analyzed, and the differences of mineral elements in animal products from different regions were analyzed. Results All the elements had a good linear relationship, the correlation coefficients were 0.9968?0.9999. The limits of detection of 15 kinds of mineral elements in animal products were 0.0047?0.5871 ng/mL. The content of K, Na and Mg in animal products from different areas were higher than those of Ca, Zn, Fe and Cu, and the content of Cd, Pb, Cr, as and Hg with potential physiological toxicity were lower. According to the detection results of heavy metal elements in animal products of 4 cities, Cd was not detected in animal products of Linzhi and Shannan. Total As was not detected in animal products of Shigatse. Cd and total Hg in animal products of Lhasa and Shigatse exceeded the standard. According to the detection of mineral element content, the highest content of major element was K, which was significantly higher than other mineral elements, and the highest content of trace element was Fe. Conclusion There are some differences in the content of mineral elements in animal products in different regions of Tibe.